<template>
    <div class="child">
        <h3>子组件2</h3>
        <h4>电脑:{{ computer }}</h4>
        <h4>书籍:{{ book }}</h4>
    </div>
</template>

<script setup lang="ts" name="Child2">
import { ref } from "vue";
let computer = ref('联想')
let book = ref(10)


defineExpose({computer,book})

</script>

<style  scoped>
.child {
    background-color: skyblue;
    padding: 10px;
    border-radius: 10px;
    box-shadow: 0 0 10px black;
}
</style>